The little things will add up here and there. Its mainly if you have aluminum wheels or steels and tire sizes vs rim size. Lift kit really wouldn't add to much weight either. Now a tool box loaded down could add a decent amount of weight depending whats in there. But sounds like your good to go.

 

I still hate to max out equipment, if truck weighs 8k I like to have 12k stands etc.

 

I like overkill regardless of what it is.

 

Exactly... safety factor! I still wouldn't put that truck up on a 9k lift.

 

It aint worth taking any chances like that. Several years ago, I bought metal car/ truck ramps at a local swapmeet, for 20 bucks. They were the stamped metal type. I had intended to change the oil on my truck, so I drove my truck onto the ramps. I went inside the house to grab a beer (mandatory when working on your truck). I came back out and saw that the ramp under the right front wheel had collapsed. Man I was sure glad I wasnt under it when it came down. I later slant cut railroad ties and made full length ramps that I can drive my truck and car on, front and rear wheels. "On-the-cheap" is not always a good thing.